20315212 has 12 divisors (see below), whose sum is σ = 35584920. Its totient is φ = 10148096.

The previous prime is 20315203. The next prime is 20315219. The reversal of 20315212 is 21251302.

It is not an unprimeable number, because it can be changed into a prime (20315219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4908 + ... + 8044.

It is an arithmetic number, because the mean of its divisors is an integer number (2965410).

Almost surely, 2^20315212 is an apocalyptic number.

It is an amenable number.

20315212 is a deficient number, since it is larger than the sum of its proper divisors (15269708).

20315212 is a wasteful number, since it uses less digits than its factorization.

20315212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20315212 is about 4507.2399536745. The cubic root of 20315212 is about 272.8603632300.

Adding to 20315212 its reverse (21251302), we get a palindrome (41566514).

The spelling of 20315212 in words is "twenty million, three hundred fifteen thousand, two hundred twelve".